Olson Dam; Myron Reservoir Report
Nearby: Stewart Dam Fischer Dam; Bill 2
Last Updated: March 1, 2026
Olson Dam, also known as Wetland 1, is a state-owned structure located in Slope, North Dakota.
Summary
Completed in 2000, this earth dam serves primarily as a Fish and Wildlife Pond, with a storage capacity of 51.7 acre-feet. The dam is designed to regulate and manage water flow from Cedar Creek-TR, covering a surface area of 5.6 acres and draining a 1.46 square mile watershed.
With a height of 11.5 feet and a length of 407 feet, Olson Dam is classified as having a low hazard potential and a moderate risk assessment. The spillway, which is uncontrolled, has a width of 40 feet. The dam is not rated for its current condition, and it has not been inspected recently. Despite these challenges, Olson Dam remains an essential resource for the local fish and wildlife population, showcasing the delicate balance between water resource management and environmental conservation in North Dakota.
°F
°F
mph
Wind
%
Humidity
15-Day Weather Outlook
Year Completed |
2000 |
Dam Length |
407 |
Dam Height |
11.5 |
River Or Stream |
CEDAR CREEK-TR |
Primary Dam Type |
Earth |
Surface Area |
5.6 |
Drainage Area |
1.46 |
Nid Storage |
51.7 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
12 |
Seasonal Comparison
5-Day Hourly Forecast Detail
Nearby Streamflow Levels
Deep Creek Nr Amidon
|
0cfs |
Little Missouri River At Marmarth
|
186cfs |
Cannonball River At Regent
|
5cfs |
Cedar Creek Nr Haynes
|
15cfs |
Heart River Nr South Heart
|
0cfs |
Little Missouri River At Medora
|
941cfs |
Dam Data Reference
Condition Assessment
SatisfactoryNo existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Olson Dam; Myron